Back support



FIG. 1 is a perspective view of the back support showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right elevation view thereof, the left elevation view being a mirror image of the right elevation view;

FIG. 5 is a top plan view thereof, the bottom plan view being a mirror image of the top plan view;

FIG. 6 is a perspective view of the back support in a second position of use;

FIG. 7 is a front elevation view thereof;

FIG. 8 is a rear elevation view thereof;

FIG. 9 is a right elevation view thereof, the left elevation view being a mirror image of the right elevation view;

FIG. 10 is a top plan view thereof; and,

FIG. 11 is a bottom plan view thereof. 

CLAIM The ornamental design for a back support, as shown and described. 